Added info on commands and usage to README.md (#9)

README.md

@@ -1,12 +1,32 @@
 My great plan is to create a Telegram chat bot that would be like [shizoid](https://github.com/top4ek/shizoid), but in Python and maybe with some extra features.
 
-#### Dependencies
+A-a-a-a-and... it works! Thanks to [@REDNBLACK](https://github.com/REDNBLACK).
+
+## Features
+
+ImaginaryFriend can:
+
+* reply to random messages in chat groups,
+* reply to replies to its messages / messages mentioning it,
+* send (one!) stiker ("I'm frustrated by all these stickers"),
+* do some commands.
+
+### Commands
+
+* `/ping`,
+* `/get_stats`: get information on how many pairs are known by ImaginaryFriend,
+* `/set_chance`: set the probability that ImaginaryFriend would reply to a random message (must be in range 1-50, default: 5),
+* `/get_chance`: get current probability that ImaginaryFriend would reply to a message.
+
+## Installation and Setup
+
+### Dependencies
 * `python >= 3.5.2`
 * `python-telegram-bot==5.2.0`
 * `orator==0.9.2`
 
-#### Setup
+### Setup
 1. Install dependencies with PIP
 2. Rename `main.cfg.example` to `main.cfg`, set `bot` and `db` properties
 3. Execute command `orator migrate -c db.py` to create database and required tables
-4. Run the `run.py` using python
+4. Run the `run.py` using python